Illustrated Glossary of Organic Chemistry
Standard
amino acid
:
One of twenty
amino acids
coded by
DNA
. Some
amino acids
(such as
selenocysteine
and
hydroxyproline
) are nonstandard
amino acids
, because they are not coded by
DNA
but instead are
biosynthesized
from standard
amino acids
.
Proline
is a standard
amino acid
.
Hydroxyproline
is a nonstandard
amino acid
.
Related terms:
Peptide
,
protein
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